3.7V to 12V DC-DC Boost Converter Fan Controller with USB-C for 5-8 Inch Motors

Compact boost control board for lithium-battery-powered fans and portable devices. Available in two variant families that provide multi-step boosted outputs to match motor requirements while keeping size, standby consumption, and wiring simple. Why you need this board - Fits tight spaces: miniaturized PCB at 35.6 mm by 27 mm for installation in compact housings. - Boosts low-voltage batteries to stable motor voltages: converts typical 3.7 V lithium battery voltage to higher outputs required by fan motors. - Saves battery life: extremely low standby current (for example around 10 microampere) reduces idle drain. - Protects wiring and hardware: built-in reverse polarity protection on battery and fan connectors helps prevent damage from incorrect connections. - Flexible compatibility: supports common PH2.0 battery and fan connectors, Type-C charging input, and brushless 5 to 8 inch motors. Key functions and performance - Boost conversion: raises battery voltage to selectable outputs to meet different fan power needs. - Multi-voltage outputs: - 9 V family: output stages 5 V, 7 V, and 9 V. LED indicators show active stage: red for 5 V, green for 7 V, blue for 9 V. The highest stage delivers up to 600 mA for the fan output. - 12 V family: output stages 5 V, 7 V, 9 V, and 12 V. Four-stage output can supply up to 800 mA at 12 V for fan use. - Inputs and charging: - Type-C input on the 9 V family rated at 5 V. When paired with a 3.7 V battery and a charging source around 5 W, the board supports simultaneous charging and discharging. If no battery is present on the 9 V family, operation is limited to the lowest output stage. - 12 V family accepts 5 V 1 A input for normal operation; simultaneous charging and discharging requires a 5 V supply capable of 3 A or more. Type-C charging supports 1000 mA; red LED indicates charging and green LED indicates fully charged. - Connectors and protections: - Battery side uses a PH2.0